diff --git a/CHANGES/6240.doc b/CHANGES/6240.doc
new file mode 100644
index 0000000000..079548a93c
--- /dev/null
+++ b/CHANGES/6240.doc
@@ -0,0 +1 @@
+update quick starter demo codes.
diff --git a/docs/client_quickstart.rst b/docs/client_quickstart.rst
index 549c455ac9..ade3678e18 100644
--- a/docs/client_quickstart.rst
+++ b/docs/client_quickstart.rst
@@ -33,9 +33,7 @@ Now, let's try to get a web-page. For example let's query
                 print(resp.status)
                 print(await resp.text())
 
-
-    loop = asyncio.get_event_loop()
-    loop.run_until_complete(main())
+    asyncio.run(main)
 
 Now, we have a :class:`ClientSession` called ``session`` and a
 :class:`ClientResponse` object called ``resp``. We can get all the